code: def register_feature_column(fc):
      """Decorator that registers a FeatureColumn for serialization."""
      _FEATURE_COLUMNS.append(fc)
      return fc
  
file_path: tensorflow-upstream/tensorflow/python/feature_column/serialization.py
imports: import six
  from tensorflow.python.feature_column import feature_column_v2_types
  from tensorflow.python.ops import init_ops
  from tensorflow.python.util import deprecation
  from tensorflow.python.util import tf_decorator
  from tensorflow.python.util import tf_inspect
  from tensorflow.python.util.tf_export import tf_export
  from tensorflow.tools.docs import doc_controls
label_desc: Use image node_id 10 for calling a global function with example usage: register_feature_column(fc) and returns: fc